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Selective recovery of nickel over iron from a nickel-iron solution using microbial sulfate reduction in a gas-lift bioreactor.
Univ Wageningen & Res Ctr, Wageningen, Netherlands.
Univ Wageningen & Res Ctr, Wageningen, Netherlands.
Umeå University.
Umeå University.ORCID iD: 0000-0002-9622-3318
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2009 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 43, no 3, 853-861 p.Article in journal (Refereed) Published
Abstract [en]

Process streams with high concentrations of metals and sulfate are characteristic for the mining and metallurgical industries. This study aims to selectively recover nickel from a nickel-iron-containing solution at pH 5.0 using a single stage bioreactor that simultaneously combines low pH sulfate reduction and metal-sulfide formation. The results show that nickel was selectively precipitated in the bioreactor at pH 5.0 and the precipitates consisted of >or=83% of the nickel content. The nickel-iron precipitates were partly crystalline and had a metal/sulfur ratio of 1, suggesting these precipitates were NiS and FeS. Experiments focusing on nickel recovery at pH 5.0 and 5.5 reached a recovery of >99.9%, resulting in a nickel effluent concentration<0.05 microM. The mixed microbial population included known sulfate reducers and acetogens. This study shows that selective metal precipitation in a single stage sulfate reducing bioreactor operated at low pH has the potential to produce metal-sulfides that can be used by the metallurgical industry as a resource for metal production.

Place, publisher, year, edition, pages
2009. Vol. 43, no 3, 853-861 p.
National Category
Microbiology
Research subject
Natural Science, Microbiology
Identifiers
URN: urn:nbn:se:lnu:diva-37337DOI: 10.1016/j.watres.2008.11.023ISI: 000263658700031PubMedID: 19059621OAI: oai:DiVA.org:lnu-37337DiVA: diva2:750377
Available from: 2014-09-29 Created: 2014-09-29 Last updated: 2016-11-30Bibliographically approved

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